![]() Then many of these are cumulative since the server was restarted, which isn’t going to help too much. There’s several ways this data is stored and it has to be retrieved differently for each type to be useful. If you know a little about this DMV then you know these values are cryptic. SQL Re-Compliations/sec – Same goes here.It’s normal for things to compile throughout the day, it’s not normal for this number to be 10x higher than before that last upgrade. I’ve seen this with a query being run once a second and a big server was running slower than my laptop. SQL Compilations/sec – This is a hidden performance killer! Some queries can’t be cached so they’re compiled every time they’re run.If this number starts going up, start looking into it. Most apps handle deadlocks gracefully, but they still lose time doing it. Deadlocks – How many deadlocks are we getting.Should be 0, always 0, if not then find out why. Memory Grants Pending – How many processes aren’t able to get enough memory to run.Should be the same as the max memory setting, but memory pressure can cause this to decrease. Target Server Memory – How much memory SQL Server is allowed to use.Typically ramps up to Target value and PLE is low as it ramps up since new pages are in memory dropping the average. Total Server Memory – How much memory SQL Server is currently using.Batch Requests/sec – How busy is the server?.Lazy Writes/sec – How many pages are written to disk outside of a checkpoint due to memory pressure.Page Writes/Sec – How many pages are written to disk. ![]() ![]() Page Reads/Sec – How many pages are read from disk.Page Lookups/Sec – How many pages are read from memory. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |